Donald Trump tweets golf ball attack on Hillary Clinton

US President Donald Trump has retweeted a doctored video of himself taking a golf swing and hitting former Democratic presidential rival Hillary Clinton, who then stumbles as she boards a plane.

Ms Clinton had been back on the Republican president's Twitter feed in recent days as she promoted What Happened, her new book about the 2016 presidential campaign, with Mr Trump resuming his campaign attack of "Crooked Hillary".

The video, retweeted by several users, shows Mr Trump on a golf course hitting a ball before seguing to the doctored shot of a golf ball hitting then-secretary of state Ms Clinton in the back as she is boarding a plane. The original video of Ms Clinton, from 2011, does not show a golf ball.